[DTV]

@DTV - would you know where the Gulf War coverage originated from? The same set also featured in the release of Terry Waite.

Judging by the blue desk, cyc and shoulder-height light blue wall in front of the cyc, I'd assume it was the Six O'Clock News set in N1. By 1991, I think only that and the One O'Clock News sets would have been the only ones in the main studios (unlike in the mid-1980s where you had a few extra bits for weekend/Two hanging around).

N6 was on the same floor as the newsroom in the news centre (new building back then).

The actual N6 studio was really in Stage 5 (as was N9), rather than the News Centre (Stage 6). But it could only have taken a few minutes to get from N6 to N8 as one of the News channel presenters had to do it every night just before 21:30.

still I never understood why they chose one of the main studios, and not comply create their own current affairs studio in the spur block, which would ensure it was right next to the newsroom.

There are a few reasons I can think of: the need to be next to the newsroom is less pressing with current affairs programming; Current Affairs teams still liked a bit of independence from News; but, primarily, it would just have been such a clearly inferior option. The main news studios were relatively small, not very flexible and had no storage space (partially due to N2 taking over the inter-studio lobby and props store in 1984). Had Current Affairs taken over one of them, it would have meant they would have had to share one smaller set across all programmes. They could have created a new studio, but space was rare (look at how tiny WSTV's studio was) and not suitable for the kind of operations that Current Affairs were used to.

On the other hand, taking over TC2 in early 1988, after several months of technical upgrades, gave them a proper studio, with full-size gallery, storage space and newly-created apparatus and graphics areas. It's also important to note that, at the time, the move to TVC was only an interim measure - News and Current Affairs were originally supposed to move to a new News Centre in the White City complex during the mid-90s. This plan ultimately fell through and was replaced with the smaller News Centre at TVC, which, of course, didn't include a single proper television studio.